#!/usr/bin/env python3
"""Apply the frozen A3 full seed-0 ResNet-20 advancement gate."""
import argparse
import json
import math
import os


SPLIT_HASH = "8328b206a97c420e49e54e3eca4abe3274c4756b084355784ea3fb8059e4515b"


def read_result(path, mode):
    with open(path) as handle:
        record = json.load(handle)
    args = record["args"]
    expected = {
        "mode": mode, "depth": 20, "width": 16, "seed": 0,
        "epochs": 200, "val_examples": 5000,
        "eval_split": "validation", "normalization": "batchnorm",
    }
    for key, value in expected.items():
        if args.get(key) != value:
            raise ValueError(f"{path}: {key} drift")
    if record["provenance"]["git_tracked_dirty"]:
        raise ValueError(f"tracked-dirty result: {path}")
    if record["split"]["validation_index_sha256"] != SPLIT_HASH:
        raise ValueError(f"split drift: {path}")
    if record["evaluation_protocol"]["test_evaluations"]:
        raise ValueError(f"A3 touched test: {path}")
    alignment = None
    if record["diagnostics"] is not None:
        alignment = float(record["diagnostics"]["early_third_mean"])
    accuracy = float(record["final"]["accuracy"])
    loss = float(record["final"]["loss"])
    return {
        "mode": mode, "path": path, "accuracy": accuracy, "loss": loss,
        "finite": record["final"]["finite"] and math.isfinite(accuracy + loss),
        "early_third_alignment": alignment,
        "total_macs": record["work"]["total_macs_estimate"],
        "peak_memory": record["hardware"]["peak_memory_allocated_bytes"],
        "source_commit": record["provenance"]["git_commit"],
    }


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("--bp_selection", default="results/oral_a_bp_selection.json")
    parser.add_argument("--dfa", default="results/oral_a_dev/dfa_full_r20_s0.json")
    parser.add_argument("--sdil", default="results/oral_a_dev/sdil_full_r20_s0.json")
    parser.add_argument("--out", default="results/oral_a_full_gate.json")
    args = parser.parse_args()
    with open(args.bp_selection) as handle:
        bp_selection = json.load(handle)
    if not bp_selection["status"].startswith("passed_"):
        raise ValueError("A1 BP reference is not viable")
    bp = read_result(bp_selection["selected"]["path"], "bp")
    dfa = read_result(args.dfa, "dfa")
    sdil = read_result(args.sdil, "sdil")
    checks = {
        "bp_at_least_90": bp["accuracy"] >= 0.90,
        "sdil_within_5pt_bp": sdil["accuracy"] >= bp["accuracy"] - 0.05,
        "sdil_beats_dfa_2pt": sdil["accuracy"] >= dfa["accuracy"] + 0.02,
        "sdil_alignment_at_least_0p05": (
            sdil["early_third_alignment"] is not None
            and sdil["early_third_alignment"] >= 0.05),
        "all_finite": all(row["finite"] for row in (bp, dfa, sdil)),
        "sdil_macs_no_more_than_bp": sdil["total_macs"] <= bp["total_macs"],
    }
    output = {
        "protocol": "oral_a_A3_v1",
        "status": "passed" if all(checks.values()) else "failed",
        "checks": checks, "rows": [bp, dfa, sdil],
        "confirmation_test_seeds_touched": False,
    }
    os.makedirs(os.path.dirname(os.path.abspath(args.out)), exist_ok=True)
    with open(args.out, "w") as handle:
        json.dump(output, handle, indent=2, sort_keys=True)
        handle.write("\n")
    print(json.dumps(output, indent=2))


if __name__ == "__main__":
    main()